Can't say I have ever seen a part no. for those heat shields. I think Rock Auto has them listed.I have a ton of used ones so if one gets a crack in it I toss it and get another. You need to connect the injectors back to the IP in some manner. I use a Tee between the second and third cylinder as it lines up better with my pump and other hoses. You can get 3.5 mm hose that is fuel rated and join them up. As for the far end one? They do have a special plug for that but a piece of hose with a bolt in it works just fine for me. Those hoses take the fuel that was not used for combustion back to the pump where it can get routed back to the tank and then back to the pump for a second try. Impact gun is an option for removal. Just be sure you have the right sized socket and hold it firmly. Don't want it bouncing off injector.